| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #if !defined CUBIC_UTILITIES_H |
| #define CUBIC_UTILITIES_H |
| |
| #include "DataTypes.h" |
| #include "SkTDArray.h" |
| |
| double calcPrecision(const Cubic& cubic); |
| #ifdef SK_DEBUG |
| double calcPrecision(const Cubic& cubic, double t, double scale); |
| #endif |
| void chop_at(const Cubic& src, CubicPair& dst, double t); |
| bool clockwise(const Cubic& c); |
| double cube_root(double x); |
| int cubic_to_quadratics(const Cubic& cubic, double precision, |
| SkTDArray<Quadratic>& quadratics); |
| void cubic_to_quadratics(const Cubic& cubic, double precision, SkTDArray<double>& ts); |
| void coefficients(const double* cubic, double& A, double& B, double& C, double& D); |
| bool controls_contained_by_ends(const Cubic& c); |
| int cubicRootsValidT(double A, double B, double C, double D, double t[3]); |
| int cubicRootsReal(double A, double B, double C, double D, double s[3]); |
| void demote_cubic_to_quad(const Cubic& cubic, Quadratic& quad); |
| double dx_at_t(const Cubic& , double t); |
| double dy_at_t(const Cubic& , double t); |
| //void dxdy_at_t(const Cubic& , double t, _Point& y); |
| _Vector dxdy_at_t(const Cubic& cubic, double t); |
| bool ends_are_extrema_in_x_or_y(const Cubic& ); |
| int find_cubic_inflections(const Cubic& src, double tValues[]); |
| int find_cubic_max_curvature(const Cubic& src, double tValues[]); |
| bool monotonic_in_y(const Cubic& c); |
| bool rotate(const Cubic& cubic, int zero, int index, Cubic& rotPath); |
| bool serpentine(const Cubic& c); |
| void sub_divide(const Cubic& src, double t1, double t2, Cubic& dst); |
| void sub_divide(const Cubic& , const _Point& a, const _Point& d, double t1, double t2, _Point [2]); |
| _Point top(const Cubic& , double startT, double endT); |
| void xy_at_t(const Cubic& , double t, double& x, double& y); |
| _Point xy_at_t(const Cubic& , double t); |
| |
| extern const int gPrecisionUnit; |
| |
| #endif |
